Quarterly Results (Unaudited) - Unaudited Quarterly Results (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 43,741		$ 32,714		$ 30,404		$ 29,128		$ 35,747		$ 25,358		$ 23,185		$ 22,717		$ 135,987	$ 107,006	$ 88,988
Operating income	1,255		575		1,285		1,071		1,108		406		464		255		4,186	2,233	178
Income before income taxes	1,166		491		1,179		1,056		938		247		362		21		3,892	1,568	(111)
Provision for income taxes	(414)		(229)		(307)		(475)		(453)		(161)		(266)		(71)		(1,425)	(950)	(167)
Net income (loss)	$ 749		$ 252		$ 857		$ 513		$ 482		$ 79		$ 92		$ (57)		$ 2,371	$ 596	$ (241)
Basic earnings per share	$ 1.57		$ 0.53		$ 1.81		$ 1.09		$ 1.03		$ 0.17		$ 0.20		$ (0.12)		$ 5.01	$ 1.28	$ (0.52)
Diluted earnings per share	$ 1.54		$ 0.52		$ 1.78		$ 1.07		$ 1.00		$ 0.17		$ 0.19		$ (0.12)		$ 4.90	$ 1.25	$ (0.52)
Shares used in computation of earnings per share:
Basic	476		474		473		471		470		468		467		465		474	467	462
Diluted	486		485		483		481		481		478		476		465		484	477	462

[1] The sum of quarterly amounts, including per share amounts, may not equal amounts reported for year-to-date periods. This is due to the effects of rounding and changes in the number of weighted-average shares outstanding for each period.